A sheet processing machine and a method for processing flat workpieces

A sheet processing machine, comprising:

• a stationary frame, comprising a transport table for transporting and supporting a sheet material, the transport table comprising a roller conveyor comprising a plurality of rollers, and a gap between two of the plurality of rollers, wherein the transport table has a transportation plane in which plane, in operation, the sheet material is moved;
• a processing tool for processing the sheet material and arranged at a first side of the transportation plane such that, in operation, the processing tool processes at a first side of the sheet material;
• a marking tool for marking the sheet material and arranged at a second side of the transportation plane such that, in operation, the marking tool marks at a second side of the sheet material, opposite the first side;
• and
• an XY-guide assembly arranged in or at the gap at the second side of the transportation plane and connecting the marking tool to the stationary frame and enabling a movement of the marking tool with respect to the stationary frame,
• wherein the marking tool is movable with respect to the stationary frame along an X-direction parallel to a transport direction of the roller conveyor and in a Y-direction perpendicular to the X-direction and parallel to the transportation plane, and wherein the movement of the marking tool with respect to the stationary frame is independently controllable relative to a movement of the processing tool with respect to the stationary frame.